Fast Addition of s‐Block Organometallic Reagents to CO
<sub>2</sub>
‐Derived Cyclic Carbonates at Room Temperature, Under Air, and in 2‐Methyltetrahydrofuran
作者:David Elorriaga、Felipe Cruz‐Martínez、María Jesús Rodríguez‐Álvarez、Agustín Lara‐Sánchez、José Antonio Castro‐Osma、Joaquín García‐Álvarez
DOI:10.1002/cssc.202100262
日期:2021.5.6
straightforward synthesis of: highly substituted tertiary alcohols, β‐hydroxy esters, or symmetric ketones, working always under air and at room temperature. Finally, an unprecedented one‐pot/two‐step hybrid protocol is developed through combination of an Al‐catalyzed cycloaddition of CO2 and propylene oxide with the concomitant fast addition of RLi reagents to the in situ and transiently formed cyclic carbonate
在2-甲基四氢呋喃中作为绿色反应介质或在没有外部挥发性有机溶剂的情况下,已在室温下研究了将高极性有机金属试剂(RMgX / RLi)快速添加到环状碳酸酯(衍生自CO 2作为可持续的C1合成子)中的情况。温度,以及空气/水分的存在。这些高反应性的主族有机金属化合物通常禁止这些反应条件。极性有机金属烷基化或芳基化试剂的正确化学计量和性质可直接合成:高取代度叔醇,β羟基酯或对称酮始终在空气和室温下工作。最后,通过将Al 2催化的CO 2和环氧丙烷的环加成反应以及随之而来的RLi试剂快速快速添加到原位和短暂形成的环状碳酸酯中,开发出了前所未有的单罐/两步混合方案。将CO 2转化为所需的高度取代的叔醇,而无需分离或纯化任何反应中间体。